Micromechanical modeling of cohesive thermoelastic steady‐state and transient cracking in polycrystalline materials
File(s)
Accepted version
Author(s)
Geraci, G
Aliabadi, MH
Type
Journal Article
Abstract
In this paper, a micromechanical formulation is proposed for modeling thermoelastic intergranular and transgranular damage and microcracking evolution in brittle polycrystalline materials. The model is based on a multiregion boundary element approach combined with the dual boundary element formulation. Polycrystalline microstructures are created through a Voronoi tessellation algorithm. Each crystal has an elastic isotropic behavior, and multiphase aggregates have been considered. Damage evolution along (intergranular or transgranular) interfaces is modeled using thermomechanical cohesive laws, and upon failure, nonlinear frictional contact analysis is introduced to model separation, stick or slip. Steady‐state and transient thermoelastic formulations have been modeled, and numerical simulations are presented, not only to demonstrate the validity but also to study the physical implications of the proposed formulation, in comparison with other numerical methods as well as experimental observations and literature results.
Date Issued
2019-03-23
Date Acceptance
2018-11-15
Citation
International Journal for Numerical Methods in Engineering, 2019, 117 (12), pp.1205-1233
ISSN
0029-5981
Publisher
Wiley
Start Page
1205
End Page
1233
Journal / Book Title
International Journal for Numerical Methods in Engineering
Volume
117
Issue
12
Copyright Statement
© 2018 John Wiley & Sons, Ltd. This is the accepted version of the following article: Geraci G, Aliabadi MH. Micromechanical modeling of cohesive thermoelastic steady‐state and transient cracking in polycrystalline materials. Int J Numer Methods Eng. 2018;1–29., which has been published in final form at https://dx.doi.org/10.1002/nme.5997
Sponsor
Clean Sky Joint Undertaking
Grant Number
671435
Subjects
Science & Technology
Technology
Physical Sciences
Engineering, Multidisciplinary
Mathematics, Interdisciplinary Applications
Engineering
Mathematics
boundary element method
cohesive microfracture
intergranular
multiphase polycrystalline
thermoelasticity
transgranular
BOUNDARY-ELEMENT METHOD
GRAIN-SIZE DEPENDENCE
IRREVERSIBLE-PROCESSES
RECIPROCAL RELATIONS
FAILURE INITIATION
BRITTLE MATERIALS
FRACTURE ENERGY
LEVEL MODEL
ZONE MODEL
DEGRADATION
Applied Mathematics
09 Engineering
Publication Status
Published
Date Publish Online
2018-12-10